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A bio-based thermoplastic elastomer material and a preparation method thereof

A thermoplastic elastomer and bio-based technology, applied in the field of bio-based thermoplastic elastomer materials and their preparation, can solve the problems of low strength and difficulty in continuous production, and achieve high strength, low cost and good resilience

Inactive Publication Date: 2014-03-19
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the elastomer only uses hydroxyalkanoate copolymer, the strength is low
In addition, the preparation method provided by this patent uses steps such as internal mixer plasticization, plasticized product cooling and re-granulation, which is difficult to achieve continuous production

Method used

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  • A bio-based thermoplastic elastomer material and a preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 42kg of 3-hydroxybutyrate homopolymer, 28kg of 3-hydroxybutyrate-4-hydroxybutyrate copolymer with 4-hydroxybutyrate monomer molar content of 28%, and 90% of vinyl acetate monomer by weight Ethylene-vinyl acetate random copolymer 30kg, behenic acid amide 0.35kg are premixed uniformly in a high-speed mixer (720 rev / min, 5 minutes), and then the above-mentioned premix is ​​added to a parallel twin-screw extruder to melt Blend extrusion to obtain bio-based thermoplastic elastomer material. The temperatures of the twin-screw extruder from the feeding section to the die section were 30°C, 150°C, 155°C, 160°C, and 165°C, respectively, and the screw speed was 100 rpm. The bio-based thermoplastic elastomer material was pressed into a sheet by a flat vulcanizer for testing of tensile properties, resilience, spherulite morphology and thermal properties. The test results are listed in Table 1.

Embodiment 2

[0023] 30kg of 3-hydroxybutyrate homopolymer, 20kg of 3-hydroxybutyrate-4-hydroxybutyrate copolymer with 28% molar content of 4-hydroxybutyrate monomer, and 90% of vinyl acetate monomer by weight Ethylene-vinyl acetate random copolymer 50kg, behenic acid amide 0.25kg are premixed uniformly in a high-speed mixer (720 rev / min, 5 minutes), then the above-mentioned premix is ​​added to a parallel twin-screw extruder to melt Blend extrusion to obtain bio-based thermoplastic elastomer material. The temperatures of the twin-screw extruder from the feeding section to the die section were 30°C, 150°C, 155°C, 160°C, and 165°C, respectively, and the screw speed was 120 rpm. The bio-based thermoplastic elastomer material was pressed into a sheet by a flat vulcanizer for testing of tensile properties, resilience, spherulite morphology and thermal properties. The test results are listed in Table 1.

Embodiment 3

[0025] 28kg of 3-hydroxybutyrate homopolymer, 20kg of 3-hydroxybutyrate-4-hydroxybutyrate copolymer with 28% molar content of 4-hydroxybutyrate monomer, and 90% of vinyl acetate monomer by weight Ethylene-vinyl acetate random copolymer 110kg, behenic acid amide 0.25kg are premixed uniformly in a high-speed mixer (720 rev / min, 5 minutes), then the above-mentioned premix is ​​added to a parallel twin-screw extruder to melt Blend extrusion to obtain bio-based thermoplastic elastomer material. The temperatures of the twin-screw extruder from the feeding section to the die section were 30°C, 150°C, 155°C, 160°C, and 165°C, respectively, and the screw speed was 150 rpm. The bio-based thermoplastic elastomer material was pressed into a sheet by a flat vulcanizer for testing of tensile properties, resilience, spherulite morphology and thermal properties. The test results are listed in Table 1.

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Abstract

The invention discloses a bio-based thermoplastic elastomer material and a preparation method thereof. The bio-based thermoplastic elastomer material comprises following raw materials by weight: 10-60 parts of a 3-hydroxybutyrate homopolymer, 10-60 parts of a hydroxyalkanoate copolymer, 10-120 parts of an ethylene-vinyl acetate random copolymer and 0.01-3 parts of a functional auxiliary agent. The bio-based thermoplastic elastomer material prepared by the preparation method has characteristics of small spherocrystal dimension, high springback rate, good resilience after being repeatedly stretched, high strength, large elongation percentage, excellent thermoplastic properties, and the like. The preparation method is simple and prone to industrialization.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a bio-based thermoplastic elastomer material and a preparation method thereof. Background technique [0002] The large-scale use and abandonment of traditional polymer materials not only cause the increasing shortage of petroleum resources, but also cause serious damage to the ecological environment. Polyhydroxyalkanoate (PHA) includes 3 hydroxybutyrate homopolymer (P3HB), 3 hydroxybutyrate-3 hydroxyvalerate copolymer (PHBV), 3 hydroxybutyrate-4 hydroxybutyrate copolymer Bioplastics (P3HB-4HB) and 3-hydroxybutyrate-3-hydroxyhexanoate copolymer (PHBH) are considered as one of the most promising and competitive materials in the bioplastic family, which can be directly produced by microbial fermentation , independent of petroleum, can be completely degraded to CO under composting conditions 2 and H 2 O, will not pollute the environment. P3HB's high crystallinity and la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L31/04C08K5/20C08K3/38B29C47/92B29C48/92
CPCB29C48/40
Inventor 马丕明蔡晓霞陈明清东为富蒋龙段芳
Owner JIANGNAN UNIV
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